Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quanto Total tem uma prata menor que 0?
 ###Tabelas: CREATE TABLE national_founders_cup (national_founders_cup_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Stage Reached VARCHAR, Against VARCHAR, Score VARCHAR, Venue VARCHAR) CREATE TABLE total_all-around_medals_by_country_1963–2013 (total_all-around_medals_by_country_1963–2013_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, Nation VARCHAR, Gold INT, Silver INT, Bronze INT, Total INT) CREATE TABLE calculations (calculations_id AUTO_INCREMENT PRIMARY KEY, Level INT, Shuttles INT, Cumulative Shuttles INT, Speed (km/h) VARCHAR, Shuttle Time (seconds) VARCHAR, Total level time (s) VARCHAR, Distance (m) INT, Cumulative Distance (m) INT, Cumulative Time (min and seconds) VARCHAR) CREATE TABLE general_election_results (general_election_results_id AUTO_INCREMENT PRIMARY KEY, General election INT, # of candidates INT, # of seats won INT, % of popular vote VARCHAR, Result VARCHAR) CREATE TABLE season_16:_2010_2011 (season_16:_2010_2011_id AUTO_INCREMENT PRIMARY KEY, Series Ep. VARCHAR, Episode INT, Netflix VARCHAR, Segment A VARCHAR, Segment B VARCHAR, Segment C VARCHAR, Segment D VARCHAR)  
SELECT COUNT Total FROM total_all-around_medals_by_country_1963–2013 WHERE Silver < 0